body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 20px;
    background-color: #f8f9fa;
}

.container {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #2d3748;
}

textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e2e8f0;
    border-radius: 6px;
    resize: vertical;
    min-height: 120px;
    font-size: 1rem;
}

input[type="file"] {
    margin-top: 0.5rem;
    padding: 0.5rem;
    border: 2px dashed #cbd5e0;
    border-radius: 6px;
    width: 100%;
}

button {
    background: #4299e1;
    color: white;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.2s;
}

button:hover {
    background: #3182ce;
}

.result-box {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 6px;
    font-size: 1.1rem;
    line-height: 1.6;
}

.success {
    background: #c6f6d5;
    color: #22543d;
    border-left: 4px solid #48bb78;
}

.error {
    background: #fed7d7;
    color: #742a2a;
    border-left: 4px solid #f56565;
}